[PATCH net-next] netfilter: xt_rateest_put() can directly call kfree()

[Eric Dumazet]

From: Eric Dumazet <eduma...@google.com>

After commit 1c0d32fde5bd ("net_sched: gen_estimator: complete rewrite
of rate estimators") we no longer have to respect an RCU grace period
after calling gen_kill_estimator()

Signed-off-by: Eric Dumazet <eduma...@google.com>
---
 include/net/netfilter/xt_rateest.h |    1 -
 net/netfilter/xt_RATEEST.c         |    6 +-----
 2 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/include/net/netfilter/xt_rateest.h 
b/include/net/netfilter/xt_rateest.h
index 
130e58361f998ecdf361910b196e69778224d955..76c9347c3645f86d55696126909f9898a6f41594
 100644
--- a/include/net/netfilter/xt_rateest.h
+++ b/include/net/netfilter/xt_rateest.h
@@ -14,7 +14,6 @@ struct xt_rateest {
        struct hlist_node               list;
        char                            name[IFNAMSIZ];
        struct gnet_estimator           params;
-       struct rcu_head                 rcu;
 
        /* keep this field far away to speedup xt_rateest_mt() */
        struct net_rate_estimator __rcu *rate_est;
diff --git a/net/netfilter/xt_RATEEST.c b/net/netfilter/xt_RATEEST.c
index 
91a373a3f534de8d8641341c33c08d8fc49cbd29..e534648aa516a86aba29b741378160a37e5b9dcb
 100644
--- a/net/netfilter/xt_RATEEST.c
+++ b/net/netfilter/xt_RATEEST.c
@@ -64,11 +64,7 @@ void xt_rateest_put(struct xt_rateest *est)
        if (--est->refcnt == 0) {
                hlist_del(&est->list);
                gen_kill_estimator(&est->rate_est);
-               /*
-                * gen_estimator est_timer() might access est->lock or bstats,
-                * wait a RCU grace period before freeing 'est'
-                */
-               kfree_rcu(est, rcu);
+               kfree(est);
        }
        mutex_unlock(&xt_rateest_mutex);
 }